M4E1 Enhanced 18" 5.56 Rifle Length Complete Upper Receiver

M4E1 Enhanced 18" 5.56 Rifle Length Complete Upper Receiver\n\nIncludes:\n- M4E1 Enhanced Assembled Upper Receiver\n- Enhanced Handguard of choice\n- 18" 5.56 Rifle Length CMV Barrel\n- Low Profile Gas Block and Rifle Length Gas Tube\n- Product comes assembled\n- This complete upper does not include BCG or Charging Handle. These products may be selected as add-ons under the Finish Your Build tab\n\nM4E1 Upper Features:\n- Forged from 7075 T6 aluminum\n- Precision machined to M4E1 specs\n- M4 feedramps\n- Matte black hard coat anodized Mil 8625 Type 3 Class 2\n- Laser engraved T-marks (Anodized only)\n- Comes assembled, with port door and forward assist installed\n- Accepts standard AR15/M16 components\n- Handguard mounting platform is forged into the receiver\n- Works with Aero Precision handguards but also fits most BAR-system handguards\n- Barrel nut and wrench are included\n\nEnhanced Handguard Features:\n- 1pc free float design\n- Rail is Machined from 6061-T6 Aluminum\n- Built in Anti-Rotation tabs\n- Scalloped rails\n- Continuous top rail\n- 1.78" inside diameter fits most muzzle devices and 1.5" suppressors\n- Compatible with low profile gas blocks\n- Gen 2 Feature - Quick disconnect sling socket at the 3, 6 and 9 o'clock positions\n- Gen 2 Feature - Additional milling along flats to aid with gripping and add visual appeal\n- Gen 2 Feature - New profile for the continuous picatinny top rail\n\n18" 5.56 Rifle Length Barrel Features:\n- 5.56 Nato 18" Rifle Length Barrel\n- 4150 CrMoV w/ QPQ finish\n- 1/7 twist\n- .750 gas block journal\n- Rifle length gas system\n- M4 Feed Ramp Extension\n- HP and MPI tested\n- Standard A2 flash hider